 #canvas{
            width: 100%;
            height: 100%;
            cursor: pointer;
            background-image: repeating-radial-gradient(circle at center center, transparent 0px, transparent 8px, rgba(255, 255, 255, 0.05) 8px, rgba(255, 255, 255, 0.05) 11px, transparent 11px, transparent 17px, rgba(255, 255, 255, 0.05) 17px, rgba(255, 255, 255, 0.05) 25px, transparent 25px, transparent 38px, rgba(255, 255, 255, 0.05) 38px, rgba(255, 255, 255, 0.05) 42px), repeating-radial-gradient(circle at center center, #aa0000 0px, #aa0000 11px, #aa0000 11px, #aa0000 19px, #aa0000 19px, #aa0000 24px, #aa0000 24px, #aa0000 33px, #aa0000 33px, #aa0000 44px, #aa0000 44px, #aa0000 46px);
            background-size: 60px 60px;
}